Honda Special Tool -- Brake Disc Grinder (never heard of such a thing before...) -- added pictures of the manual

Bought this at the Honda internal charity silent auction sale (to support the Pediatric Brain Tumor Foundation).  Looks like it's never been used...

Note the date stamp on the paper (October 31, 1959...  Holloween 1959!).  Noritake is also known for their ceramic dinner ware.

It says "manufactured by Honda under license."  Then states some patent numbers...